gforth/float.fs - diff

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version 1.39, 2002/12/05 19:25:23	version 1.41, 2003/01/26 20:56:37
Line 211 set-current	Line 211 set-current
\G @code{f~abs}; r3=0: bitwise comparison; r3<0: @code{fnegate f~rel}.	\G @code{f~abs}; r3=0: bitwise comparison; r3<0: @code{fnegate f~rel}.
fdup f0=	fdup f0=
IF \ bitwise comparison	IF \ bitwise comparison
fp@ float+ 1 floats over float+ -text 0=	fp@ float+ 1 floats over float+ over str=
fdrop fdrop fdrop	fdrop fdrop fdrop
EXIT	EXIT
THEN	THEN
Line 222 set-current	Line 222 set-current
fnegate f~rel	fnegate f~rel
THEN ;	THEN ;

1e 53 0 [do] f2* [loop] fconstant fround-offset \ 2^53

: fround ( r1 -- r2 ) \ float f-round
\G Round to nearest integral value. Break ties with round-to-even.
\ assumes IEEE DP FP in round-to-even mode.
\ for an explanation of this code read
\ <2002Oct26.113823@a0.complang.tuwien.ac.at> ff.
fdup f0> if
fround-offset f- fround-offset f+
else fdup f0< if \ leave 0e and -0e as is
fround-offset f+ fround-offset f-
then then ;

: f.s ( -- ) \ gforth f-dot-s	: f.s ( -- ) \ gforth f-dot-s
\G Display the number of items on the floating-point stack,	\G Display the number of items on the floating-point stack,
\G followed by a list of the items; TOS is the right-most item.	\G followed by a list of the items; TOS is the right-most item.